AS3701 datasheet(72/110 Pages) AMSOSRAM

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ams Datasheet

Page 71

[v1-11] 2016-Dec-14

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AS3701 − Register Description

Figure 82:

SD_control1

Addr:30h

SD_control1

Bit

Bit Name

Default

Access

Bit Description

sd1_enable

Global stepdown SD1 enable

0 : SD1 disabled

1 : SD1 enabled

sd1_low_

noise

Enables low noise mode of SD1. If enabled smaller

current pulses and output ripple is activated

0 : Normal mode. Minimum current pulses of >100mA

applied in skip mode

1 : Low noise mode. Only minimum on time applied in

skip mode

5sd1_fast

RW_SM

Selects a faster regulation mode for SD1 suitable

for larger load changes.

0 : Normal mode, Cext=10

μF

1 : Fast mode, Cext=22

μF required

4sd1_fsel

RW_SM

Selects between high and low frequency range

0 : 1 MHz if sd1_frequ=0, 3MHz if sd1_frequ=1

1 : 2 MHz if sd1_frequ=0, 4MHz if sd1_frequ=1

dvm_enable

Enabling of Dynamic Voltage Management

If voltage of SD1 is changed during operation (sd1_vsel)

voltage is de/increased by single steps

0 : DVM disabled

1 : DVM enabled

dvm_time

Time steps of DVM voltage change of SD1

0 : 8

μsec time delay between steps

1 : 16

μsec time delay between steps

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